This innovative software series enables your Disklavier Mark III piano to perform with the world's most popular CDs! Using Yamaha's PianoSmart Technology, this companion diskette will magically empower your Disklavier Mark III to accompany the exciting audio performance from the designated CD. (Use only the CD listed. The commercial CD is NOT INCLUDED and must be purchased separately.) 18 songs: Gods and Generals · You Must Not Worry for Us · My Home Is Virginia · The Soldier's Return · 'Cross the Green Mountain.